Pressure-pump and vacuum-trap.



l. E. L. OGDEN.

PRESSURE PUMP AND VACUUM TRAP.

APPLICATION FILED JAN. :2. 19m.

PatentedApr. 6, 1915.

2 SHEETS-SHEET 1.

J. E. L. OGDEN.

PRESSURE PUMP AND VACUUM TRAP.

APPLICATION FILED JAN. 12. 1914.

1 1 3,%@5O Patented Apr. 6, 1915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS co., PHOTOVLITHCL, WASHINGTON. By C JOHN EDWARD LEWIS OGDEN, 0F DISCARD, ENGLAND.

PRESSURE-PUMP AND VACUUM-TRAP.

menace.

Application filed January 12, 1914.

To all whom it may concern:

Be it known that I, JOHN EDWARD LEWIS OGDEN, a subject of the King of Great Britain and Ireland, and resident of Penshurst, Lincoln Drive, Liscard, in the county of Chester, England, engineer, have invented certain new and useful Improvements in Pressure-Pumps and Vacuum-Traps, of which the following is a specification.

This invention relates to pressure pumps and vacuum traps adapted for pumping fluids or discharging same from vessels in which the pressure is less than atmospheric.

Referring to the accompanying explanatory drawings: Figure 1 is a sectional elevation of a pressure pump and vacuum trap constructed in one convenient form in accordance with my invention. Figs. 2 and 3 illustrate respectively the adaptation of my improved apparatus for discharging liquid from a vessel under a vacuum, and for pumping liquid from a low to a high level.

The same reference letters in the three views indicate the same or similar parts.

I make the apparatus casing a of any suitable form and provide an inlet 1) and an outlet 0 thereon. The float d which acts in the manner of a floating piston (and is hereinafter so termed) is adapted to be an easy fit within the casing 54- and slides upon a sleeve like element 6 or a rod guided at its lower end by a pin f projecting into the casing from the bottom thereof and at its upper end by the guide portion of a valve 9 which is attached to said spindle or rod 0. The said valve 9 serves to control communica tion between the vacuum or vapor space of the system being drained and the casing a. Or, in the case when the apparatus is used for pumping purposes only, the said valve controls communication with the atmosphere by the pipe 9, see Fig. 3. It has a cylindrical piston like portion thereon as shown adjacent to the guide wings and preferably also a conical or miter portion. The valve is actuated partly by the floating piston cl and partly by the difference of pressures at its two sides as hereinafter explained. Adjacent to said valve 9, which will be hereinafter termed the equalizing valve, a second valve h, hereinafter termed a pressure valve, is provided to control the flow of steam or air under pressure to the float chamber a, the said valve being operated by a rod or arm 2' cooperating with the valve 9 so that the two valves act in unison.

Specification of Letters Patent.

Patented Apr. 6, 1915.

Serial No. 811,701.

The operation of the apparatus when arranged as shown in Fig. 2 is as follows: Assuming that the casing a is empty, the floating piston 03, which is of the closed type will be at the bottom of the casing a and will engage a stop j upon its central guiding sleeve or rod 6 so as to open the equalizing valve 9 and simultaneously allow of the closing of the valve h by the withdrawal of its operating arm 71 from contact with the valve stem; the valve h is then closed by the steam or air under pressure. The casing is now exhausted and placed under a vacuum so that liquid can flow thereto by gravity from the pipe or vessel m being drained. As the casing a fills, the floating piston d rises and eventually engages the underside of the equalizing valve 9 or a part attached thereto so as to cause the piston portion of said valve to cut off communication between the casing and the vapor space of the pipe or vessel being drained. Simultaneously the arm 2' operating the valve it, engages the stem of that valve and partially opens the latter. The casing a is then placed under pressure and this results in the conical portion of the equalizing valve 9 being forced upon its seat by the difference of pressures at its two sides and also in the full opening of the valve h. The pressure then acts upon the upper surface of the floating piston (Z (the latter acting as a piston and when required as a non-conductor of heat between the gaseous fluid and water) and eXpels the water from the apparatus through the discharge valve It will be readily understood that as the floating piston is an easy fit within the casing a, there is only a small area for the pressure agent, which may be steam, to contact with the water around the piston and thus economy of steam is insured. Further, when the floating piston is in its uppermost position, there is a minimum of clearance space so that the discharge takes place promptly upon the opening of the valve h. The floating piston d is a closed vessel containing air and acts as an insulator for preventing condensation of the steam when the latter acts as the pressure agent, by the relatively cold water in the apparatus. I provide non return valves on the apparatus inlet and outlet, and also a spring or like loaded valve upon the outlet so that the apparatus may work under any desired pressure. A safety valve may be fitted upon the casing to prevent anexcessive pressure being applied thereto through the valve h for discharging purposes. The discharge may be performed by gravity instead of. by steam pressure. In such case, I

may arrange for the admission of air by the valveh. Or, the discharge may be effected by compressed air and the valve 9 serve to control communication with the atmosphere. This adaptation of my invention-is shown in- Fig. 8. The apparatus serves to raise liquid from the tank m to the tank a. It-

' Will be seen that in accordance With my invention, the float d on its up-stroke only causes the piston portion of the equalizing valve 9 to cutoff communication between the casing and vapor space of the vessel being drained, the remainder'of the closing movement of such valve and also the final opening movement of the pressure valve it being accomplished by the increase of pres sure in the float chamber a. I thereby insure the full opening of the valve h and the full closing of the valve stroke of the float.

Having noW described my invention What 9 at each upward mlclaimcas neW and desire to secure by Letters Patent is V 1. A pressure pump and vacuum trap, comprising in combination, a casing having inlet and outlet ports, a floating piston in said casing, a rod guiding said piston and operated by the latter, an equalizing valve on said rod, a pressure valve, and an arm engaging said equalizing valve and operating said pressure valve, as set forth.

2. A pressure pump and vacuum trap,

comprising incombination, a casing having inlet and outlet ports, a floating piston With-- WVitnesses ARTHUR HUGHES, HILDA HUGHES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O.

JOHN EDWARD LEWIS OGDEN- 

